<template>
  <div class="preview"></div>
</template>
<script>
export default {

}
</script>
<style lang="less" scoped>
.preview {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 999;
}
</style>
